BIOSTRATIGRAPHY OF THE EOCENE CARBONATE DEPOSITS IN THE EASTERN PART OF THE CENTRAL IRAN (TORBAT-E-JAM AREA): STRATIGRAPHIC SIGNIFICANCE OF NUMMULITES PERFORATUS AND CALCAREOUS NANNOFOSSILS

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MOSADDEGH H.; HADI M.

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Journal: GEOSCIENCES Year:2017 | Volume:26 | Issue:102 Page(s): 91-100

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Title

BIOSTRATIGRAPHY OF THE EOCENE CARBONATE DEPOSITS IN THE EASTERN PART OF THE CENTRAL IRAN (TORBAT-E-JAM AREA): STRATIGRAPHIC SIGNIFICANCE OF NUMMULITES PERFORATUS AND CALCAREOUS NANNOFOSSILS

Author(s)

MOSADDEGH H. | HADI M. | Issue Writer Certificate

Keywords

EOCENEQ2

BARTONIANQ2

LARGE BENTHIC FORAMINIFERAQ1

CALCAREOUS NANNOFOSSILSQ1

TORBAT-E-JAMQ2

Abstract

The EOCENE marine deposits in the Chenarbu section in TORBAT-E-JAM region (eastern part of Central Iran Zone) have been biostratigraphically studied based on LARGE BENTHIC FORAMINIFERA coincide with Shallow Benthic Zones (SBZ) and CALCAREOUS NANNOFOSSILS, according to standard worldwide zones (NP). This investigation has been conducted on carbonate sediments with a focus on LARGE BENTHIC FORAMINIFERA assemblage such as Eorupertia magna (La Calvaz), Fabiania cassis (Oppenheim), Eoannularia eoconica (Cole ve Bermudez), Gypsina sp., Textularia sp., Nummulites perforatus (De Montfort) Nummulites sp., Discocyclina sp., Rotalia sp., Acervulina sp., and CALCAREOUS NANNOFOSSILS such as Cribrocentrum reticulatum, Sphenolithus obtusus, Sphenolithus spiniger, Sphenolithus editus, Helicosphaera compacta, Coccolithus pelagicus, Coccolithus eopelagicus, Reticulofenestra sp., Discoaster sp., Discoaster siapanensis, Discoaster barbadiensis. Therefore, based on the determined index species, the SBZ15?- 17 biozones of LARGE BENTHIC FORAMINIFERA and the NP16 biozone of CALCAREOUS NANNOFOSSILS in the studied section have been detected which both assign the Late Lutetian- Early BARTONIAN (Middle EOCENE) age for the section. Also, the Lutetian- BARTONIAN boundary according to index calcareous nannofossil species was separated carefully, and the first appearance of the foraminifera species of N. perforatus (de Montfort) in the middle part of the deposited sequence was recorded during geological time of the BARTONIAN stage. Therefore, this fact points that in Iran alike western parts of the Tethys basin, the first appearance of N. perforatus (de Montfort) occurred in Early Barthonian (SBZ17). Systematic of Nummulites perforatus (de Montfort) was described based on typological and biometrical characterization.

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APA: Copy

MOSADDEGH, H., & HADI, M.. (2017). BIOSTRATIGRAPHY OF THE EOCENE CARBONATE DEPOSITS IN THE EASTERN PART OF THE CENTRAL IRAN (TORBAT-E-JAM AREA): STRATIGRAPHIC SIGNIFICANCE OF NUMMULITES PERFORATUS AND CALCAREOUS NANNOFOSSILS. GEOSCIENCES, 26(102), 91-100. SID. https://sid.ir/paper/31484/en

Vancouver: Copy

MOSADDEGH H., HADI M.. BIOSTRATIGRAPHY OF THE EOCENE CARBONATE DEPOSITS IN THE EASTERN PART OF THE CENTRAL IRAN (TORBAT-E-JAM AREA): STRATIGRAPHIC SIGNIFICANCE OF NUMMULITES PERFORATUS AND CALCAREOUS NANNOFOSSILS. GEOSCIENCES[Internet]. 2017;26(102):91-100. Available from: https://sid.ir/paper/31484/en

IEEE: Copy

H. MOSADDEGH, and M. HADI, “BIOSTRATIGRAPHY OF THE EOCENE CARBONATE DEPOSITS IN THE EASTERN PART OF THE CENTRAL IRAN (TORBAT-E-JAM AREA): STRATIGRAPHIC SIGNIFICANCE OF NUMMULITES PERFORATUS AND CALCAREOUS NANNOFOSSILS,” GEOSCIENCES, vol. 26, no. 102, pp. 91–100, 2017, [Online]. Available: https://sid.ir/paper/31484/en

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